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  2. Phenol red - Wikipedia

    en.wikipedia.org/wiki/Phenol_red

    Phenol red, 40 μM: colors in cell culture medium at a pH range from 6.0 to 8.0. Most living tissues prosper at a near-neutral pH—that is, a pH close to 7. The pH of blood ranges from 7.35 to 7.45, for instance. When cells are grown in tissue culture, the medium in which they grow is held close to this physiological pH. A small amount of ...

  3. Resazurin - Wikipedia

    en.wikipedia.org/wiki/Resazurin

    Resazurin (7-Hydroxy-3 H -phenoxazin-3-one 10-oxide) is a phenoxazine dye that is weakly fluorescent, nontoxic, cell-permeable, and redox‐sensitive. [2] [3] Resazurin has a blue to purple color above pH 6.5 and an orange color below pH 3.8. [4] It is used in microbiological, cellular, and enzymatic assays because it can be irreversibly ...

  4. Universal indicator - Wikipedia

    en.wikipedia.org/wiki/Universal_indicator

    Universal indicator. A universal indicator is a pH indicator made of a solution of several compounds that exhibit various smooth colour changes over a wide range pH values to indicate the acidity or alkalinity of solutions. A universal indicator can be in paper form or present in a form of a solution. [1]

  5. Bicarbonate indicator - Wikipedia

    en.wikipedia.org/wiki/Bicarbonate_indicator

    Bicarbonate indicator. A hydrogencarbonate indicator (hydrogencarbonate indicator) is a type of pH indicator that is sensitive enough to show a color change as the concentration of carbon dioxide gas in an aqueous solution increases. The indicator is used in photosynthesis and respiration experiments to find out whether carbon dioxide is being ...

  6. Alizarine Yellow R - Wikipedia

    en.wikipedia.org/wiki/Alizarine_Yellow_R

    Alizarine Yellow R is a yellow colored azo dye made by the diazo coupling reaction. It is usually commercially available as a sodium salt. In its pure form, it is a rust-colored solid. [2] It is mainly used as a pH indicator .

  7. Methyl orange - Wikipedia

    en.wikipedia.org/wiki/Methyl_orange

    Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the p Ka of a mid strength acid, it is usually used in titration of strong acids in weak bases that ...

  8. Zazzle - Wikipedia

    en.wikipedia.org/wiki/Zazzle

    Zazzle. Zazzle is an American online marketplace that allows designers and customers to create their own products with independent manufacturers (clothing, posters, etc.), as well as use images from participating companies. Zazzle has partnered with many brands to amass a collection of digital images from companies like Disney, Warner Brothers ...

  9. Bromocresol purple - Wikipedia

    en.wikipedia.org/wiki/Bromocresol_purple

    Bromocresol purple ( BCP) or 5′,5″-dibromo-o-cresolsulfophthalein, is a dye of the triphenylmethane family ( triarylmethane dyes) and a pH indicator. It is colored yellow below pH 5.2, and violet above pH 6.8. In its cyclic sulfonate ester form, it has a p Ka value of 6.3, and is usually prepared as a 0.04% aqueous solution.

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